The magnetic moment ($\mathrm{\mu }$) of a revolving electron around the nucleus varies with principal quantum number n as

• A

  $\mathrm{\mu }\propto \mathrm{n}$

• B

  $\mathrm{\mu }\propto \frac{1}{\mathrm{n}}$

• C

  $\mathrm{\mu }\propto {\mathrm{n}}^2$

• D

  $\mathrm{\mu }\propto \frac{1}{{\mathrm{n}}^2}$